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Communication Dans Un Congrès Année : 2017

EXIT-based optimization of linear precoder for MIMO encoded systems assuming turbo detection

Résumé

The concatenation of the multiple-input multiple- output (MIMO) linear precoder with an outer forward error correction (FEC) code at the transmitter is investigated in this pa- per. At the receiver side, the turbo detection is taken into account, which iteratively exchanges the extrinsic information between a soft-demapper and a FEC soft-decoder. We firstly propose a new precoder named F_I_1 precoder thanks to the extrinsic information transfer (EXIT) chart analysis. The proposed precoder aims to optimize the iterative receiver convergence by maximizing the ending point I_1 of the soft-demapper EXIT function. For the sake of low-complexity, F_I_1 is designed for two data streams MIMO transmission only. Secondly, to cope with the higher data streams transmission, a global b = 2K data streams system is split into K two data streams subsystems. F_I_1 is then applied at each subsystem. Finally, we propose a new algorithm to optimize the inter-subsystems power allocation with the criterion is to maximize I_1 of the global system.
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Dates et versions

hal-01582658 , version 1 (06-09-2017)

Identifiants

Citer

Nhat Quang Nhan, Philippe Rostaing, Karine Amis Cavalec, Ludovic Collin, Emanuel Radoi. EXIT-based optimization of linear precoder for MIMO encoded systems assuming turbo detection. ICC 2017 : IEEE International Conference on Communications, May 2017, Paris, France. pp.1 - 6, ⟨10.1109/ICC.2017.7996950⟩. ⟨hal-01582658⟩
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